Reminds me of the "say the alphabet backwards" challenge that cops often present in sobriety tests.
Drunk: ZYX... ZYXW... wait-wait... okay, ZYXTW, ummm...
Sober: I can't do that.
Stoned: Oh whaaat? No way, man. I can't even do that sober - shit, I mean...
The field sobriety and breathalyzer tests are just excuses to get suspected DWIs into the drunk tank nowadays.
Once there they'll draw blood for drug and blood-alcohol testing. That's the test that will be used in court if it gets that far.
>I'm also quite sure that you could train for soberty tests
Not a doctor but I don't know that you could fake out a Horizontal Gaze Nystagmus Test: https://en.wikipedia.org/wiki/Field_sobriety_testing
I wonder how a cop would react if you started singing the alphabet backwards.
In fact I think it's mostly not a test they use, or if it is it's to see how the person handles it, not that they can actually do it.
Because refusing to obey a police officer who's considering arresting you is such a sober decision.
I'm not sure if that would work in practice. As mentioned, alcohol makes someone more confident, or more likely to do stupid things. The test should incorporate that.
From another point of view, the alcohol tricks you into thinking your reflexes are still normal, while they are not. And this is the dangerous part, not the fact that your reflexes are somewhat lower (and perhaps comparable to an old lady who is still perfectly capable to drive safely).